Answer:
x = 5, y = 9.
Step-by-step explanation:
8^x / 2^y = 64
3^4x * (1/9)^(y -1) = 81
From the first equation
2^3x / 2^y = 2^6
2^(3x-y) = 2^6
So 3x - y = 6 ..........(1)
From the second equation:
3^4x * 9^(-(y-1)) = 3^4
3^4x * 3^2(-(y-1)) = 3^4
3^(4x+ 2(1 - y)) = 3^4
So 4x + 2(1 - y) = 4
4x - 2y = 2
2x - y = 1 .............(2)
Subtract: (1) - (2):
x = 5.
and 2(5) - y = 1
so y = 9.
Solving the simultaneous equations we get x is 5 and y is 9 .
Simultaneous equations in algebra are those that concurrently involve two or more variables, such as x and y. Even though they are solved simultaneously, the equations are known as simultaneous equations. Just these equations alone have innumerable answers.
A system of equations, often known as an equation system, is a collection of finite equations for which common solutions are sought.
The two given equations can be simplified as:
\(8^x \div 2^y = 64\\\\or,\frac{2^{3x}}{2^y} =2^6\\\\or, 2^{3x-y}=2^6\\\\or, 3x-y = 6\)
And :
\(3^{4x} \times (\frac{1}{9})^{y-1}=81\\\\or, 3^{4x} \times 3^{-2(y-1)}=3^4\\\\or, 3^{4x+2-2y}=3^4\\\\or, 4x-2y = 2\\\\or,2x-y=1\)
Now we can solve the two simultaneous equations :
3x - y = 6 and 2x - y = 1
Subtracting the equations we get:
x = 5
and
y = 9
Solving the simultaneous equations we get the value of x as 5 and the value of y as 9 .
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use cylindrical shells to find the volume v of the solid. a right circular cone with height h and base radius r
To find the volume of a right circular cone using cylindrical shells, we can imagine stacking infinitesimally thin cylindrical shells along the height of the cone.
How does the cylindrical shell use to find the volume?Each cylindrical shell will have a radius equal to the radius of the cone at that height. By summing up the volumes of all these cylindrical shells, we can determine the total volume of the cone.
Let's assume the height of the cone is represented by 'h' and the base radius is represented by 'r'. We'll integrate along the height of the cone from 0 to h.
The volume of a cylindrical shell at a height 'y' can be calculated using the formula:
dV = 2πy² circumference² dy,
where 'dy' represents the thickness of the cylindrical shell, and the circumference is given by 2πr.
Integrating this expression from 0 to h will give us the total volume:
V = ∫[0 to h] 2πy² 2πr²dy.
Simplifying the expression:
V = 4π²r ∫[0 to h] y² dy.
Integrating y with respect to y gives:
V = 4π²r² [y²/2] evaluated from 0 to h.
Evaluating the expression at the limits:
V = 4π²r² [(h²/2) - (0²/2)].
Simplifying further:
V = 4π²r ² (h²/2).
Finally, the volume of the right circular cone can be expressed as:
V = 2π²r² h².
So, the volume of the solid cone is given by 2π²r ² h² when using cylindrical shells.
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please answer the question hurry up get 25 point
Answer:
\(x = - 1.\)
Step-by-step explanation:
\( {2}^{x} = \frac{1}{2} \\ {2}^{x} = {2}^{ - 1} \\ x = - 1.\)
♨Rage♨
Step-by-step explanation:
Hey there!
Given;
\( {2}^{x} = \frac{1}{2} \)
We know that (1/2) can be written as 2^-1. So, it will be;
\( {2}^{x} = {2}^{ - 1} \)
Looking on both sides we find that both have same base. So,
x = -1
(Note: While solving the exponential equation you must make base same by simplifying them and then equate the power)
Hope it helps...
Consider a random variable X with the probability mass function f(1)=c, and f(x)= 2 x
⋅x!
1
for x=2,3,4,…. (a) Find E[X]. (b) Find the probability that X would be less than or equal to 3 .
The probability that X is less than or equal to 3 is 2.333 times the constant c.
(a) To find the expected value E[X], we use the definition of expected value for discrete random variables. We sum the product of each possible value of X and its corresponding probability.
E[X] = 1 * c + 2 * (2/2!) * c + 3 * (2/3!) * c + 4 * (2/4!) * c + ...
Simplifying the expression, we have:
E[X] = c + c + c + c + ...
Since the probabilities sum up to 1, the expected value simplifies to:
E[X] = c + c + c + c + ... = ∑(n=1 to ∞) c = ∞
Therefore, the expected value E[X] is infinite.
(b) To find the probability that X is less than or equal to 3, we sum the probabilities of all values less than or equal to 3.
P(X ≤ 3) = P(X = 1) + P(X = 2) + P(X = 3)
P(X ≤ 3) = c + (2/2!) * c + (2/3!) * c
Simplifying further, we have:
P(X ≤ 3) = c + c + (2/3) * c = 2.333c
Therefore, the probability that X is less than or equal to 3 is 2.333 times the constant c.
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NUMBER SENSE An account earns r% simple interest per year. Does doubling the initial principal have the same effect on the total interest earned as doubling the amount of time? Justify your answer.
The answer is No. Doubling the initial principal does NOT have the same effect on the total interest earned as doubling the amount of time.
Why is this ?Assume we have a $ 1000 starting principal and a 5% interest rate.
We will gain $50 in interest after one year, for a total of $1050. We will earn $100 in interest after one year if we double the initial principle to $ 2000
Thus, double the initial investment has resulted in doubling the total interest received.
Assume we retain the starting capital at $ 1000 but increase the time period from one to two years.
We gain $ 100 in interest after two years at 5 % of $1000 per year for a total of $1, 100. So, increasing the time period doubles the amount of interest earned every year but not the overall amount of interest earned.
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find the zeros of y=x^2-12x+36
Answer:
x=6
Step-by-step explanation:
(x-6)^2=0
b) For V = Pi r squared , find V when r = 12.5 and h = 8
World War I, often abbreviated as WWI or WW1, also known as the First World War or the Great War, was an international conflict that began on 28 July 1914 and ended on 11 November 1918
solve the question math
For number 7 it's not negative right
Answer: it is -10
Step-by-step explanation: it is negative because since 35 is a bigger number u cannot take 35 out of 25 so it has to go below 0
If f(x)=3x^(5)+4x^(3)+3, then what is the remainder when f(x) is divided by x-3 ?
The Remainder when dividing f(x) by x - 3 is 840
The remainder when dividing the polynomial f(x) = 3x^5 + 4x^3 + 3 by the binomial x - 3, we can use the polynomial remainder theorem. According to the theorem, if we substitute the divisor, x - 3, into the polynomial f(x) and evaluate it at x = 3, the resulting value will be the remainder.
Let's calculate the remainder using this approach:
Substituting x = 3 into the polynomial f(x), we have:
f(3) = 3(3)^5 + 4(3)^3 + 3
= 3(243) + 4(27) + 3
= 729 + 108 + 3
= 840
Therefore, when f(x) = 3x^5 + 4x^3 + 3 is divided by x - 3, the remainder is 840.
In summary, the remainder when dividing f(x) by x - 3 is 840.
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Please help me find the balance at the end of three months.
The balance at the end of three months is $652.
How to calculate simple interest amount?If the initial amount (also called as principal amount) is P, and the interest rate is R% annually, and it is left for T years for that simple interest, then the interest amount earned is given by:
\(I = \dfrac{P \times R \times T}{100}\)
Given;
P=$630
R=0.14/12
= 0.01166
n=3
Interest rate = 14%
Using the formula;
A=P(1+r)^n
we can now insert the values
A=630(1+0.01166)^3
A=652.29
Therefore, the by interest of 14% the amount will be $652.29.
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Because studies used in a meta-analysis have typically used different statistical tests, a statistic called _____ size is used to put all the results into a common scale.
Because studies used in a meta-analysis have typically used different statistical tests, a statistic called effect size is used to put all the results into a common scale.
A meta-analysis is a statistical approach used to synthesize the results of several studies. It is a quantitative study of studies. In other words, it is a method that uses statistical analysis to incorporate the results of multiple clinical studies, which helps to obtain a more precise and reliable estimate of the impact of the intervention.
Effect size is used to combine all the results of the different studies into a common scale because each study might use a different statistical test that is not directly comparable to other studies.What is effect size?Effect size is a numerical value that describes the magnitude of the difference between two groups in a study. It allows researchers to compare the findings from different studies that might use different measurement instruments.
A large effect size implies a significant difference between the two groups in a study. Conversely, a small effect size indicates that there is no meaningful difference between the groups. Effect size is calculated as the standardized difference between the means of two groups divided by their standard deviation (Cohen’s d).
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Which of the following is not true about the mean of a set of data?
The mean can be less than the minimum data value.
The mean can be the same value as the median.
The mean can be different from all the data values.
The mean can be one of the data values.
Answer:
i think the answer is -> "the mean can be less than the minimum data value."
Step-by-step explanation:
mean means the average and by finding the average you need to add up all your set values then divide it, so with that being said the mean will always need to be higher than the lowest data set of value.
Simplify 5 (6-3)+2
A.) -29
B.) -13
C.) 17
D.) 25
E.) 29
Please I need the answer!!
Answer:
C)
Step-by-step explanation:
Greetings! Hope this helps!
Answer
C.) 17
___________
5 (6-3) + 2
5 (3) + 2
15 + 2
17
Have a good day!
_______________
A brainliest would help tons! :D
can i please get some help on this i will mark brainlyest (i dont know how to spell it)
Answer: The first one is17power-9
The second one is 1
Step-by-step explanation:
el numero decimal 3,1 representa a la fraccion 3 entre 10
Answer:
ne cheaso le uprenta singil layu ka bts dung lyr
anisa sells pawpaws at 4 for $65.00. she want to buy a dresser costing $3,725.00. if she had $475.00 how many pawpaws does she need to sell to earn he rest of the money
Answer:
50 units of 4 pawpaws
(200 pawpaws total)
Step-by-step explanation:
Money still needed for the dresser: ($3725.00 - $475.00) = $3250.00
Anisa needs to sell enough pawpaws to raise $3250.00.
Each set of four pawpas raises $65.00.
$3250.00/$65.00 = 50 units of 4 pawpaws is needed to raise $3250.00.
Individual pawpaws is 4*50 = 200 pawpaws.
In 1999, the student enrolment at a college was 13% more than it was in 1998. If the enrolment was 36,612 in 2000, which was 8% more than 1999, find the enrolment in 1998
Answer:
1998= 30,000 students
Step-by-step explanation:
Giving the following information:
In 1999, the student enrolment at a college was 13% more than it was in 1998. If the enrolment was 36,612 in 2000, which was 8% more than 1999, find the enrolment in 1998
First, we need to determine the enrolment in 1999:
1999= 36,612/1.08
1999= 33,900
Now, we can find the enrolment in 1998:
1998= 33,900/1.13
1998= 30,000
usage patterns are a variable used in blank______ segmentation.
Answer:
usage patterns are a variable used in market segmentation.
Step-by-step explanation:
Usage patterns are a variable used in behavioral segmentation.
Behavioral segmentation is a marketing strategy that divides a market into different segments based on consumer behavior, specifically their patterns of product usage, buying habits, and decision-making processes. This segmentation approach recognizes that customers with similar behavioral characteristics are likely to exhibit similar preferences and respond in a similar manner to marketing initiatives.
Usage patterns, as a variable, help marketers understand and classify customers based on how they interact with a product or service. This can include factors such as the frequency of product usage, the amount of product used, the timing of purchases, brand loyalty, product benefits sought, and other behavioral indicators.
By analyzing usage patterns, marketers can identify distinct segments within their target market and tailor marketing strategies to meet the unique needs and preferences of each segment. This enables companies to develop more targeted marketing campaigns, optimize product offerings, improve customer satisfaction, and drive customer loyalty.
Overall, behavioral segmentation, including the consideration of usage patterns, allows companies to better understand and connect with their customers by aligning their marketing efforts with specific behaviors and motivations.
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Hello, I need some help with question 8! Please show work as the instructions asked! If you want to see my answers to the other questions within the assignment, please let me know!
Looking at the graph
The end behavior of the given function is
f(x)→−∞, as x→−∞
f(x)→+∞, as x→+∞
The degree of the polynomial is Odd
The leading coefficient is positive
The degree of the polynomial is at least 3
so
Root with a multiplicity 1 -----> x=4
Root wit a multiplicity 2 (even) ---> x=-2
therefore
Real roots ---------> x=-2 and x=4
factors --------> (x-4) and (x+2)^2
A factor with an odd multiplicity ---------> (x-4)
Code Piece S
In two or more complete sentences, describe the transformation(s) that take place on the parent function, f(x) = log(x), to achieve the graph of g(x) = log(-2x-4) + 1.
Using translation concepts, it is found that the parent function was:
Reflected over the x-axis.Horizontally compressed by a factor of 2.Shifted right 4 units.Shifted up 1 unit.The parent function is:
\(f(x) = \log{x}\)
The first transformation is:
\(\log{x} \rightarrow \log{-x}\)
Which means that it was reflected over the x-axis.Then, \(\log{-x} \rightarrow \log{-2x}\), which means that it was horizontally compressed by a factor of 2.
Then, \(\log{-2x} \rightarrow \log{-2x - 4}\), which means that it was shifted right 4 units.
Finally, 1 was added to the function, which means that it was shifted up 1 unit.
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When eliminating a loop-carried dependency that adds a constant, the closed-form direct solution will likely contain a multiplication. true or false
The statement "When eliminating a loop-carried dependency that adds a constant, the closed-form direct solution will likely contain a multiplication" is true because eliminating a loop-carried dependency that adds a constant simplifies the equation, but to obtain a closed-form direct solution, we need to express the result as a function of the current iteration's variables only
When eliminating a loop-carried dependency that adds a constant, the closed-form direct solution will likely contain a multiplication. This is because the loop-carried dependency adds a constant to the result of the previous iteration, which means that the current iteration's result is a function of both the current iteration's variables and the previous iteration's result.
By eliminating this dependency, we remove the need to use the previous iteration's result, which simplifies the equation. However, to obtain a closed-form direct solution, we need to express the result as a function of the current iteration's variables only, which often involves a multiplication. This is because multiplication is a fundamental mathematical operation that allows us to combine variables in a way that preserves their individual values.
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True. When eliminating a loop-carried dependency that adds a constant, the closed-form direct solution will likely contain a multiplication. This is because the loop-carried dependency is typically expressed as an addition, and removing it would result in a product of the loop index and the constant.
when eliminating a loop-carried dependency that adds a constant, the closed-form direct solution will likely contain a multiplication. This is because the process often involves applying mathematical transformations that result in multiplications to simplify the loop and eliminate dependencies.
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Help Please!! IXL lesson: Make predictions using experimental probability
Zoe supplies costumes to a number of theater companies. She recently provided 20 different hats, including 4 fedoras. Considering this data, how many of the next 15 hats requested from Zoe's inventory should you expect to be fedoras?
The 6 fedοras expect if next 30 hats requested frοm Zοe's inventοry, and She recentIy prοvided 20 different hats, incIuding 4 fedοras.
What is the ratiο?It is described as the cοmparisοn οf twο quantities tο determine hοw many times οne οbtains the οther. The prοpοrtiοn can be expressed as a fractiοn οr as a sign: between twο integers.
The ratiο οf hats tο fedοras = 20:4
Let's suppοse Zοe's inventοry, shοuId expect tο x fedοras
20/4 = 30/x
x = 30/5
x = 6
Thus, the 6 fedοras expect if next 30 hats requested frοm Zοe's inventοry, and She recentIy prοvided 20 different hats, incIuding 4 fedοras.
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A
5
B
3
4
С
Find tan(B) in the triangle.
Answer:
Step-by-step explanation:The tangent of an angle is the trigonometric ratio between the adjacent side and the opposite side of a right triangle containing that angle. Example: In the triangle shown, tan(A)=68 or 34 and tan(B)=86 or 43 .
Given two sides
if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root: a = √(c² - b²)
if leg b is unknown, then. b = √(c² - a²)
for hypotenuse c missing, the formula is. c = √(a² + b²)
Answer:
it’s 3/4
Step-by-step explanation:
it’s right for khan (trigonometric ratios in right triangles)
Write an equation in slope-intercept form for a line that passes through points (-1, 2) and (5, -10)
Find the variable (this is special right triangles unit)
Ill thanks, 5 star and brainliest for the correct answer, plus there is 50 points in it for you
Answer:
a= 10sqrt(2) , b= 10
Step-by-step explanation:
In the picture above that you can see the explanation of solution.
Jan is making dinner. She uses 25 lbs of carrots in soup. She uses 3 of carrots in salad. About how many pounds of carrots did lan use in all?
Answer:
28 pounds of carrots.
Step-by-step explanation:
25+3=28
Find the surface
7 in.
4 in.
4 in.
+
4 in.
5 in.
7 in.
5 in.
j
SA = [?]in.² please explain how you got it I’m stuck
(3, -4), m= 6 point slope
Answer:
If you are looking for the other quordinate the answer is (4,2)
Step-by-step explanation:
\(m= \frac{rise}{run} = \frac{6}{1}\) so you will have to start from the giving coordinate to find the next.
So, you go up to 6 and then since the 1 is positive you will turn right one time
Census data from a city of 150,000 residents produced the income distribution shown here: A distribution curve of income in thousands of dollars. The curve is right skewed with a mean between 50 and 100. Suppose that we were to take random samples of 100 residents from this population and calculate ˉ x as the sample mean income of the residents in each sample.
Using the Central Limit Theorem, it is found that the shape of \(\bar{x}\) is approximately normal.
The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \(\mu\) and standard deviation \(\sigma\), the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \(\mu\) and standard deviation \(s = \frac{\sigma}{\sqrt{n}}\).
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.In this problem, the distribution is not normal, however the sample size is of 100 > 30, hence the Central Limit Theorem is applicable and the shape of \(\bar{x}\) is approximately normal.
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Henry predicted whether he got answers right or wrong in his 50 question exam.
He identified the 36 questions he thought he got right.
It turns out that Henry got 5 questions wrong that he thought he got correct and he only got 11 of the questions wrong he had predicted.
What is the percentage accuracy he had with predicting his scores?
Answer:
42/50 x2 =84%
Step-by-step explanation: